- /**
- * Determines if the requested page is out of bounds
- *
- * @param page current page
- * @param postsPerPage - number of blog rendered on each page
- * @param totalPosts - total blog in this category/total
- * @returns {boolean} if this is a valid page
- */
- const isValidPage = function(page, postsPerPage, totalPosts)
- {
- return !(page === 0 || page -1 >= totalPosts/postsPerPage);
- };
-
- module.exports=
- {
- /**
- * Renders two buttons on the bottom of the page to
- * go to the left or right
- *
- * Used by the home page and categories pages
- * @param baseURL -- base url of page being rendered
- * @param currentPage -- current page being rendered
- * @param postsPerPage -- number of blog on each page
- * @param totalPosts -- total amount of blog in the category
- * @returns {Promise} promise which renders the buttons
- */
- main: function(baseURL, currentPage, postsPerPage, totalPosts, templateContext)
- {
- if(typeof currentPage == "undefined")
- currentPage = 1;
- currentPage = Number(currentPage);
-
- if(!isValidPage(currentPage, postsPerPage, totalPosts))
- {
- reject("Invalid Page");
- }
-
- var paginationObject = new Object();
-
- var nextPage = currentPage + 1;
- var previousPage = currentPage - 1;
-
- if (isValidPage(previousPage, postsPerPage, totalPosts))
- {
- paginationObject.previous = {url: baseURL + "?page=" + previousPage};
- }
-
- if (isValidPage(nextPage, postsPerPage, totalPosts))
- {
- paginationObject.next = {url: baseURL + "?page=" + nextPage};
- }
-
- var page = 1;
- var pages = [];
- while(isValidPage(page, postsPerPage, totalPosts))
- {
- if(page === currentPage)
- {
- pages.push({isCurrent: true, number: page})
- }
- else
- {
- pages.push({number: page, url: baseURL + "?page=" + page})
- }
- page = page + 1;
- }
- paginationObject.pages = pages;
- templateContext.pagination = paginationObject;
- }
- };
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